EXAMINER: You're walking across the desert when you come upon a tortoise that's turned over on its back--

SPOCK: (interrupts) I help it get back on its feet.

EXAMINER: (mildly irritated) I wasn't done. You could do that, but you don't. Why not?

SPOCK: Yes I do do that. It would be illogical not to assist. It costs me nothing and may save the tortoise's life.

EXAMINER: (trying to be reasonable) I need you to answer the question as it was posed.

SPOCK: I can think of only three hypothetical situations where it would be logical not to assist the tortoise, and all of them are highly unlikely. Is there, perhaps, an endangered predator species in the vicinity, which only eats this species of tortoise? Is there some concrete reason why I cannot afford to stop walking for even a moment, and if so, why am I not running?

EXAMINER: (shaking his head) Let's just move on.